Colour and genetic rules

Well if you post some pictures of the colors you know, we can sure tell you what we know them as.

Ok, my mare is seal brown. I found out that. But in the color calculator that Poseidon posted link to, there is no such a colour as seal brown. Which colour should I choose?

Bay. You would pick as they don't have a separate thing for brown at this time. There is a test for it, but the color calculator doesn't give brown as an option. Brown and bay are both forms of agouti though.

Thanks :)
And her grandfather was Cassini I, he was grey (white), and again there are tones of other options and I don't know which one is his colour.

Here he is:

Unfortunately without knowing his base color under the grey, there really isn't any way to say what he could produce...

Base color is unknown :P
Thanks anyway :)

What about more rare colors like champagne? I think my brother's mare is a double champange (I am not sure what else to call it) and bred to a black I believe a EE. What would that make?